11. a 2.5-kg block slides down a 25o inclined plane with a constant acceleration. the block starts from rest at the top. at the bottom, its velocity reaches 0.65 m/s. the length of the incline is 1.6m. a) what is the acceleration of the block?
b) what is the coefficient of friction between the plane and the block?
c) does the result of either (a) or (b) depend on the mass of the block?
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The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?
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The protons in a nucleus are approximately 2 โ 10^โ15 m apart. consider the case where the protons are a distance d = 1.93 โ 10^โ15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.
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11. a 2.5-kg block slides down a 25o inclined plane with a constant acceleration. the block starts f...
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